NASAのインスタグラム(nasa) - 4月18日 07時43分

Mars Rover Selfie! This self-portrait of our Mars Exploration Rover Opportunity shows effects of wind events that had cleaned much of the accumulated dust off the rover's solar panels. It combines multiple frames taken by Opportunity's panoramic camera (Pancam) through three different color filters March 22 through March 24, 2014, the 3,611th through 3,613th Martian days, or sols, of Opportunity's work on Mars. This image is presented in false color to make differences in surface materials more easily visible, and as a vertical projection. The mast on which the Pancam is mounted does not appear in the image, though its shadow does.

Cleaning effects of wind events in March boosted the amount of electricity available for the rover's work. With the cleaner arrays and lengthening winter days, Opportunity's solar arrays are generating more than 620 watt-hours per day in mid-April 2014, compared to less than 375 watt-hours per day in January 2014. In its sixth Martian winter, Opportunity now has cleaner solar arrays than in any Martian winter since its first on the Red Planet in 2005.

Image Credit: NASA/JPL-Caltech/Cornell Univ./Arizona State Univ.

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